Should I Insulate Roof Deck Or Floor In New Construction

My customer wants to insulate under the deck because they are complaining of a cold floor in winter.

Should i insulate roof deck or floor in new construction. We want to insulate the floor which is two different levels. See pictures as the deck is close to the ground about a foot on one side and 6 inches on the other looks like the former owner put some sort of tarp on the ground. During cooler night times and in winter periods the deck temperature can then be below the dew point of the interior air. This type of foundation could use insulation in the floor.

During the construction process many builders insulate the outside of foundation walls before backfilling. Quinn therm qrfr ffr insulation is a foil faced insulation board which helps further improve the thermal performance to help achieve the desired u value. And two floors were added above. The roof deck is cold wood decks without insulation above them will readily equilibrate to the exterior temperature.

Hence the term cold decks construction materials wood based products absorb moisture. Plan to pull up the flooring and layer new insulation on top of the old. However if the shed is already built there could be two ways to insulate the floor. The problem with insulating both surfaces is that you trap moisture.

Either insulate the air handler and ducts or insulate the roof underside and remove the floor insulation. I have a customer who previously had a deck enclosed and converted to living space basically adding a dining room and a living room to the adjacent kitchen off the back of the house. With no ventilation your warm air convecting up into the attic will condense most likely in the attic floor. With the floor gone you ll have to find a spot elsewhere for stashing those off season clothes and that holiday decor.

A wood and pier foundation will allow air flow under the shed. But if the floor is covered in plywood you can t stuff enough insulation beneath it to do the job sufficiently not even in warm climates. You can place insulation between the floor joists as you are building your shed. One side we can crawl under on the other side we will need to take up the deck boards.

Then attach the flooring to the joists. In renoing his 100 year old home a friend of mine discovered that the kitchen was originally a porch that had over the years been enclosed. In new construction consider construction techniques that provide both foundation structure and insulation such as insulating concrete forms and insulating concrete blocks. We live in eastern pa.